Control of a building complex with Magneto-Rheological Dampers and Tuned Mass Damper

Amini, F.,Doroudi, R. Techno-Press 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.2

Coupled building control is a viable method to protect tall buildings from seismic excitation. In this study, the semi-active control of a building complex is investigated for mitigating seismic responses. The building complex is formed of one main building and one podium structure connected through Magneto-Rheological (MR) Dampers and Tuned Mass Damper. The conventional semi-active control techniques require a primary controller as a reference to determine the desired control force, and modulate the input voltage of the MR damper by comparing the desired control force. The fuzzy logic directly determines the input voltage of an MR damper from the response of the MR damper. The control performance of the proposed fuzzy control technique for the MR damper is evaluated for the control problem of a seismically-excited building complex. In this paper, a building complex that include a 14-story main building and an 8-story podium structure is applied as a numerical example to demonstrate the effectiveness of semi-active control with Magneto-Rheological dampers and its comparison with the passive control with the Tuned Mass Damper and two uncoupled buildings and hybrid semi-active control including the Tuned Mass Damper and Magneto-Rheological dampers while they are subject to the earthquake excitation. The numerical results show that semi-active control and hybrid semi-active control can significantly mitigate the seismic responses of both buildings, such as displacement and shear force responses, and fuzzy control technique can effectively mitigate the seismic response of the building complex.

Control of a building complex with Magneto-Rheological Dampers and Tuned Mass Damper

F. Amini,R. Doroudi 국제구조공학회 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.2

Coupled building control is a viable method to protect tall buildings from seismic excitation. In this study, the semi-active control of a building complex is investigated for mitigating seismic responses. The building complex is formed of one main building and one podium structure connected through Magneto-Rheological (MR) Dampers and Tuned Mass Damper. The conventional semi-active control techniques require a primary controller as a reference to determine the desired control force, and modulate the input voltage of the MR damper by comparing the desired control force. The fuzzy logic directly determines the input voltage of an MR damper from the response of the MR damper. The control performance of the proposed fuzzy control technique for the MR damper is evaluated for the control problem of a seismically-excited building complex. In this paper, a building complex that include a 14-story main building and an 8-story podium structure is applied as a numerical example to demonstrate the effectiveness of semi-active control with Magneto-Rheological dampers and its comparison with the passive control with the Tuned Mass Damper and two uncoupled buildings and hybrid semi-active control including the Tuned Mass Damper and Magneto-Rheological dampers while they are subject to the earthquake excitation. The numerical results show that semi-active control and hybrid semi-active control can significantly mitigate the seismic responses of both buildings, such as displacement and shear force responses, and fuzzy control technique can effectively mitigate the seismic response of the building complex.

미기상 수치 모델을 이용한 고층아파트 입지에 따른 바람장 및 기온 변화 연구

서홍석(Houng Seok Seo),김유곤(Yoo Gon Kim),양고수(Go Soo Young) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.5

본 연구에서는 미기상 수치 모델 ENVI-MET3.0을 이용하여 고층 건물 입지에 따른 바람장과 기온 변화를 분석하였다. 대상지역은 고층 아파트 단지가 계획되어 있는 전주시 도심지이며, 실제 설계 자료를 적용하였다. 건물 입지에 따른 미기상 변화를 분석하기 위해 건물 입지전과 후에 대해 모델링을 수행한 후, 그 변화량을 분석하였다. 모델링 수행시 기상 조건은 연구대상 지역의 기후분석을 통해 두 가지를 선정하였는데, 첫 번째 조건은 풍향을 남남동(SSE)풍, 두 번째 조건은 풍향을 서(W)풍 계열로 하였다. 바람길 분석은 풍속, 열섬 분석은 기온 변화량을 통해 분석을 실시하였다. 풍속 분석 결과, 건물높이보다 낮은 고도에서는 바람이 유입되는 지역에서는 0.2~2.5 m/s 정도 증가한 반면, 건물 사이에서는 0.5~2.0 m/s 정도감소하였다. 건물 높이 이상의 고도에서는 건물이 위치한 단지 내에서는 0.1~0.8 m/s㎧정도 감소하는 반면, 단지 외부에서는 0.2~0.4 m/s 정도 증가하였다. 열섬 분석 결과, 건물 높이보다 낮은 고도에서는 건물이 위치한 단지 내와 풍하방향 지역에서는 기온이 0.01~0.1℃ 증가한 반면, 단지 외부에서는 0.01~0.05℃ 감소하였다. 건물 최고 높이 부근에서는 대부분의 지역에서 0.05~0.2℃정도 감소하였다. This study was carried out to analyze the change of wind filed and heat island according to the location of the rise building using micrometeorology numerical model Envi-met3.0. In this study, the real urban planning of Jeonju city was as input for the location and height of buildings. Modeling was performed for two conditions as input data. Case 1 is that direction is SSE and case 2 is W. To analyse the change of wind filed, wind speed results were used. To analyze the change of island, temperature results were used. Below the building height, wind speed increased 0.2~2.5 m/s at the inflow area and decreased 0.5~2.0 m/s at the area between the buildings. Above the building height, wind speed decreased 0.1~0.8 m/s near the building complex. On the other hand, wind speed increased 0.2~0.4 m/s in the outside area of the building complex. In the case temperature, below the building height, temperatures increased 0.01~0.1℃ in the building complex and leeward area. On the other hand, temperature decreased 0.01~0.0.05℃ in the outside area of the building complex. Above the buildings height, temperatures decreased 0.05~0.2℃ in most of the area.

Complex Power: An Analytical Approach to Measuring the Degree of Urbanity of Urban Building Complexes

Xu, Shuchen,Ye, Yu,Xu, Leiqing Council on Tall Building and Urban Habitat Korea 2017 International journal of high-rise buildings Vol.6 No.2

The importance of designing urban building complexes so that they obtain 'urban' power, rather than become isolated from the surrounding urban context, has been well recognized by both researchers and practitioners. Nevertheless, most current discussions are made from architects' personal experiences and intuition, and lack a quantitative understanding, to which obstacles include an in-depth exploration of the 'urban' power between building complexes and the urban environment. This paper attempts to measure this feature of 'urban', i.e., 'urbanity,' through a new analytical approach derived from the opendata environment. Three measurements that can be easily collected though the Google Maps API and Open Street Map are applied herein to evaluate high or low values of urbanity. Specifically, these are 'metric depth', i.e., the scale of extended public space, 'development density', i.e., density and distribution of point of interests (POIs), and 'type diversity', i.e., diversity of different commercial types. Six cases located in Japan, China and Hong Kong respectively are ranked based on this analytical approach and compared with each other. It shows that Japanese cases, i.e., Osaka Station City and Namba Parks, Osaka, obtained clearly higher values than cases in Shanghai and Hong Kong. On one hand, the insight generated from measuring and explaining 'urban' power would help to assist better implementation of this feature in the design of urban building complexes. On the other hand, this analytical approach can be easily extended to achieve a large-scale measurement and comparison among different urban building complexes, which is also helpful for design practitioners.

공동주택 단지의 주동형식에 따른 냉난방 에너지 및 외기냉방 효과 분석

노지웅(Roh, Ji-Woong) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.4

This study makes three apartment building complex an object of analyzing representative building types and energy consumption rate of households, and effect of outdoor air cooling. Recently created apatrment complex is composed of very various types of building, plan, and orientation etc. But, it is difficult to remark conclusively that these various types of buildings are designed energy-effectively. Because architects are hard to find useful energy design guideline for decision making. By the preceding study, the present condition and problem about this subject is grasped, apartment building types were examined and representative types were extracted. In this study, energy simulation was conducted, and the effect to outdoor aircooling was analyzed about representative types of the subject apartment complex. It is expected that this analysed results will be basic data for the more integrated study. Research consequence can be summarized as follow: 1) Besides solar gain, household layout of building, orientation, and plan etc. effects compositively on energy consumption rate. 2) The effect of ourdoor air cooling in building of tower type can be improved by arranging households appropriately.

해방 이후 조선총독부청사의 변천과 그 의미

정희선 한국민족운동사학회 2018 한국민족운동사연구 Vol.0 No.94

After liberation, most colonial architectures have changed and remained in public space. They have been used continuously for practical reason. Retention of colonial architectures does not mean mere continuance of space but symbolism as well. Japanese Government-General Building, built in 1926, was critical architecture that represented colonial power of Japanese imperialism era. Even after the liberation of Korea, it had been used for 50 years as United States Army Military Government in Korea(USAMGIK), Central Government Complex and National Museum of Korea. So far, studies of Japanese Government-General Building were concentrated on certain period– completion and removal. But it is necessary to study changes of colonial architectures after liberation of Korea. This research examines changing processes of the building throughout its existence by focusing on its usage as main government building after liberation. Through this, the study is to find out in what logic that made modern architecture representing colonial power was used and removed. After Korean independence, though the Japanese Government-General Building was symbol of colonial power, it was kept in use as main office building of government for economical efficiency. It was used as USAMGIK right after liberation, and became the Capitol building after government formation. Its economic feasibility had fell because of damages due to Korean War, still it was more financially better to repair than built new one. After 1980s, as economy grew, ‘Recovery of Ethnicity’ came to the fore and the Japanese Government-General Building was changed to National Museum of Korea. Jeon Doohwan regime, which had lack of political legitimacy, carried out this plan to gain public popularity. Kim Yeongsam government made policy of deconstruction of building as part of ‘Historical Rectification’. Processes change and removal was all for ‘Recovery of National identity’. However, social interest was just focus on visible action and discussion about historical meaning of the architecture was not viewed. Most of modern architectures, existing nowadays, are now facing maintenance or abolition on decision of center or local governments. To maintain modern buildings, it is necessary to avoid from unconditional logic, and make standard to look modern culture heritage in overall and long-term perspective. Korean modern architectures were kept in use after liberation for practical reason and individual of them changed in various ways. Therefore, it is difficult to apply one certain standard on decision on maintenance of them. Each of them were used in different ways depends on situation after liberation, there is need to look at historicity of the building throughout its entire existing period. 해방 이후 식민지 건축물은 대부분 현실적인 이유로 도시공간에 존속하였다. 식민지 건축물의 존속은 단지 물리적 공간의 연속에 그치는 것이 아니라 건물이 가진 상징성 또한 연속되는 것이었다. 1926년 준공된 조선총독부청사는 일제의 식민권력을 상징하는 핵심적인 건축물이었다. 조선총독부청사는 해방 이후에도 군정청, 중앙청, 국립중앙박물관으로 50여 년간 활용되었다. 그동안 조선총독부청사를 다룬 연구는 주로 건물의 준공과 철거라는 특정 시기에 집중하였다. 본 연구에서는 식민지 건축물의 변천을 해방 전후에 걸쳐 유기적으로 살펴볼 필요가 있다고 보고, 해방 이후 조선총독부청사의 활용에 주목하였다. 이를 통해 식민권력을 상징하는 근대건축물이 해방 이후 어떠한 논리를 통해 활용되고 철거되었는지 살펴보고자 하였다. 해방 이후 조선총독부청사는 경제적 효율성이라는 현실적 이유에서 계속 활용되었다. 조선총독부청사는 해방 직후 미 군정청으로 활용되었고, 정부 수립 이후 중앙청이 되었다. 한국전쟁으로 건물이 훼손되면서 조선총독부청사의 경제성이 떨어졌지만, 여전히 대체할 건물을 신축하는 것보다 조선총독부청사를 복구하는 것이 경제적 이점을 가졌다. 1980년대 이후 경제성장과 함께 ‘민족성 회복’의 문제가 사회 전면에 대두되면서 조선총독부청사는 국립중앙박물관으로 개편되었다. 권력획득 과정의 정당성이 취약했던 전두환 정권은 대중적 지지를 유도하기 위해 중앙청을 국립중앙박물관으로 개편하였다. 김영삼 정부는 역사바로세우기 사업의 일환으로 조선총독부청사 철거를 정책적으로 추진하였다. 조선총독부청사의 개편과 철거 과정은 모두 ‘민족성 회복’을 목적으로 하였다. 그러나 그 과정에서 건물의 역사적 의미에 대한 논의보다 가시적인 행위에 사회적 관심이 집중되었다. 현재 대부분의 근대건축물은 중앙 혹은 지방정부의 정책적 판단으로 건물의 존폐가 갈리고 있다. 근대건축물의 보존을 위해서 무조건적인 보존이나 철거 논리에서 벗어나 근대문화유산을 종합적이고 장기적인 관점에서 바라볼 수 있는 기준을 정립해야한다. 한국의 근대건축물은 해방 이후 현실적 필요에 따라 계속 활용되면서 개별 건축물이 다양하게 변용되었다. 따라서 근대건축물은 보존과 철거 결정에 일괄적인 기준을 적용하기 어렵다. 각각의 근대건축물이 상황에 따라 해방 전후 다양하게 활용되었기 때문에, 건물의 특정 시기에 국한하지 않고 전체 존속 시기를 아울러 해당 건물의 역사성을 살펴보아야한다.

지역사회 봉사와 이용률 증대를 위한 복합교회건축에 관한 연구 : 교회와 교육시설의 복합건축을 중심으로 focused on the Church and Education Complex Building

임영호,박재승 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)

The purpose of this study was to propose the model of the church and education complex building. Church is the body of Jesus Christ and called and sent to serve others. Jesus showed his way of life as a sample of churches. But contemporary churches do not follow that sample, so churches need to be renewed. Current issues on the contemporary church are 'serving community', 'raising efficiency', 'focusing on other that worship space', 'raising flexibility' and etc. This study was focused on the 'serving community' and 'raising efficiency'. Preceded researches and books were the foundation of this study and several churches were samples of this study. Through this study, church and education complex building can be realized to be the good model of sound churches.

수도권 신도시 공동주택단지의 주동배치 계획기법에 관한 연구

송기백,김영하 대한건축학회 2007 대한건축학회논문집 Vol.23 No.7

As a part of the residential policy on concentration of population in a metropolis with the growth of economy, housing complexes were supplied for several years at that time with promoting new town construction. But those were concentrated on the quantitative supply rather than the qualitative improvement. So the purpose of this study is to make good use of the planning methods as basic data for residential building block layout in new town housing complex. And the final aim is the contribution to desirable residential environment and to creation of diverse cityscape. It studied on new town and district units plan and extracted the factors related to residential building block layout from literature investigation and preceding research. Through that, It offered important factors for the plan and the frame of analysis. Focused on the guiding of district units plan, using this analysis frame, it examined residential building block layout in the 1st and 2nd new town housing complex and studied on the planning methods for Residential Building Block Layout through comparison analysis and understanding what matters were reflected in the plan field at the process of plan for housing complex in each new town.

용적율 증가가 공동주택단지의 일조환경에 미치는 영향에 관한 연구

이승민,박상동,신기식,최무혁 대한건축학회 2005 대한건축학회논문집 Vol.21 No.4

In the multi-unit residential building complex, increase of floor area ratio will affect sunlight environment, consumption of energy and water, traffic, quantity of waste and so on. Among various impacts by increase of floor area ratio, sunlight environment of entire multi-unit residential building complex is analyzed and comfort of indoor environment is investigated in this study.The purpose of this study is to analyze sunlight environment of multi-unit residential building complex affected by increase of floor area ratio and use it as basic materials of future legislation related to incentive for disseminating green multi-unit residential building.

충남 ‘상생산업단지’ 실태분석 및 개선방안 연구

서명희(Seo, Myoung Hee),장수명(Jang, Soomyung),홍성효(Hong, Sung Hyo) 한국지역개발학회 2017 韓國地域開發學會誌 Vol.29 No.1

This study aims to analyze the realities of industrial complexes in Chungnam and the policy, "Co-living Industrial Complex" of Chungnam and its improvement plan. The Co-living Industrial Complex of Chungnam stands for an industrial region with living amenities, such as residence, education, medical care, and culture, which is based on industrial district theory and complex industrial park theory. The industrial complexes in Chungnam did not fully form sufficient living conditions for workers so that the realities of them cause job-housing separation for workers, which has brought about negative side effects such as lowered labor productivity and outflows of regional income to other regions. In other hand, the Co-living Industrial Complex Policy that aims to overcome this situation from 2012 shows signs that most resources for this policy has been devoted to facility construction, such as sports centers, residential complex, and apartment houses. Out analysis indicates that there is no specific development strategy for social networks and cultural factors for quality of life including education, medical care, and culture, and improved subjective capability of companies and regional residents, and also there was a lack of development strategy for industrial complex"s association with local communities. To succeed the Co-living Industrial Complex, the followings are recommended. First, the overall living conditions of workers and residents should be improved, utilizing the central government projects for industrial complexes. Second, citizens and residents should build up their capabilities by forming trust and network with local community in addition to innovative capabilities of company through constructing industry-university collaboration system in region, and utilizing community building and social economy. Lastly, cases should be formed through pilot project with strategic selection and concentration, above all.